The screw in the logic board corner of the bottom plate (one of the long screws) seems to have a bit more tension than the other screws. What are the chances that I have damaged the internal threads (in the receptor hole)? Obviously, this type of screw only goes in one direction (straight down). 6 of the screws along the front and sides go in at an angle... Can subsequent removal of the bottom case cause the internal threads in the receptor hole to fail to the point where the screw will no longer "bite"? How can I test to make sure this is not occurring? I recently upgraded my ram and I had to remove and replace my bottom case a few times to get it perfectly aligned (and to stop the notorious metallic creaking noise). I was able to fix it, but I am just worried about my screw receptacle's threads.